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Ultrahigh rate capability of 1D/2D polyaniline/titanium carbide(MXene)nanohybrid for advanced asymmetric supercapacitors

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Nano Research 2022年第1期15卷 285-295页

作者： Jinhua Zhou Qi Kang Shuchi Xu Xiaoge Li Cong Liu Lu Ni Ningna Chen Chunliang Lu Xizhang Wang Luming Peng Xuefeng Guo Weiping Ding Wenhua Hou Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong UniversityShanghai 200240China Analytical Testing Center Yangzhou UniversityYangzhou 225009China

High energy density and enhanced rate capability are highly sought-after for supercapacitors in today's mobile world.In this work,polyaniline/titanium carbide(MXene)(PANI/Ti3C2Tx)nanohybrid is synthesized through a facile and cost-effective self-assembly of.one-dimensional(10)PANI nanofibers and two-dimensional(20)Ti3C2Tx nanosheets.PANl!Ti3C2Tx delivers greatly improved specific capacitance,ultrahigh rate capability(67%capacitance retention from 1 to 100 A·g^(-1))as well as good cycle stability.Electrochemical kinetic analysis reveals that PANI/Ti3C2Tx is featured with surface capacitance-dominated process and has a quasi-reversible kinetics at high scan rates,giving rise to an ultrahigh rate capability.By using PANl!Ti3C2Tx as positive electrode,an 1.8 V aqueous asymmetric supercapacitor(ASC)is successfully assembled,showing a maximum energy density of 50.8 Wh·kg^(-1)·(at 0.9 kW-kg-1)and a power density of 18 kW·kg^(-1)(at 26 Wh·kg^(-1)).Moreover,an 3.0 V organic ASC is also elaborately fabricated,·by using PANI/Ti3C2Tx,achieving an ultrahigh energy density of 67.2 Wh·kg^(-1)(at 1.5 kW·kg^(-1))and a power density of 30 kW·kg^(-1)·(at 26.8 Wh·kg^(-1)).The present work not only improves fundamental understanding of the structure-property relationship towards ultrahigh rate capability electrode materials,but also provides valuable guideline for the rational design of high-performance:energy storage devices with both high energy and power densities.

关键词： MXene polyaniline nanohybrid asymmetric supercapacitor rate capability

nanohybrid membrane in algal-membrane photoreactor: Microalgae cultivation and wastewater polishing

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Chinese Journal of Chemical Engineering 2019年第11期27卷 2799-2806页

作者： Woon Chan Chong Abdul Wahab Mohammad Ebrahim Mahmoudi Ying Tao Chung Kamrul Fakir Kamarudin Mohd Sobri Takriff Chemical Engineering Programme Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanJalan Sungai LongBandar Sungai LongCheras43000 KajangSelangorMalaysia Research Center for Sustainable Process Technology(CESPRO) Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia Department of Chemical Engineering and Petroleum Engineering Faculty of EngineeringTechnology and Built EnvironmentUCSI UniversityNo.1Jalan Menara GadingUCSI HeightsCheras56000 Kuala LumpurMalaysia

Microalgae cultivation has gained tremendous attention in recent years due to its great potential in green biofuel production and wastewater treatment application. Membrane technology is a great solution in separating the microalgae biomass while producing high quality of permeate for recycling. The main objective of this study was to investigate the filtration performance of Ag/GO-PVDF(silver/graphene oxide-polyvinylidene fluoride) membrane in an algalmembrane photoreactor(A-MPR) by benchmarking with a commercial PVDF(com-PVDF) membrane. In this study, Chlorella vulgaris microalgae was cultivated in synthetic wastewater in an A-MPR for ammoniacal-nitrogen and phosphorus recovery and the wastewater was further filtered using Ag/GO-PVDF and com-PVDF membranes to obtain high quality water. Spectrophotometer was used to analyze the chemical oxidation demand(COD), ammoniacal nitrogen(NH3-N) and phosphate(PO43-). The concentration of proteins and carbohydrates was measured using Bradford method and phenol-sulfuric acid method, respectively. The COD of the synthetic wastewater was reduced from(180.5 ± 5.6) ppm to(82 ± 2.6) ppm due to nutrient uptake by microalgae. Then, the Ag/GO-PVDF membrane was used to further purify the microalgae cultivated wastewater, resulting in a low COD permeate of(31 ± 4.6) ppm. The high removal rate of proteins(100%) and carbohydrates(86.6%) as the major foulant in microalgae filtration, with low membrane fouling propensity of Ag/GO-PVDF membrane is advantageous for the sustainable development of the microalgae production. Hence, the integrated A-MPR system is highly recommended as a promising approach for microalgae cultivation and wastewater polishing treatment.

关键词： Algal-membrane photoreactor nanohybrid membrane Wastewater polishing Microalgal cultivation Nutrient recovery

Synthesis and characterization of multiwall carbon nanotubes/alumina nanohybrid-supported cobalt catalyst in Fischer-Tropsch synthesis

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Journal of Energy Chemistry 2013年第4期22卷 582-590页

作者： Ali Karimi Bahram Nasernejad Ali Morad Rashidi Chemical Engineering Department Amir Kabir University of Technology Nanotechnology Research Center Research Institute of Petroleum Industry

Multiwall carbon nanotubes （MWNTs） and alumina are combined to give a new type of nanohybrid for Fisher-Tropsch synthesis （FTS） catalyst support. Alumina nano-particles （10 wt%） were introduced directly on functionalized MWNTs by a modified sol-gel method. Microstructure observations show that alumina particles were homogeneously dispersed on the inside and outside of modified MWNTs surfaces. 15 wt% cobalt loading catalysts were prepared with this nanohybrid and γ-alumina as a reference, using a sol-gel technique and wet impregnation method respectively. These catalysts were characterized by TEM, XRD, N2-adsorption, H2 chemisorption and TPR. The deposition of cobalt nanoparticles synthesized by sol-gel technique on the MWNTs nanohybrid shift the reduction peaks to a low temperature, indicating higher reducibility for uniform cobalt particles. nanohybrid also aided in high dispersion of metal clusters and high stability and performance of catalyst. The proposed MWNTs nanohybrid-supported cobalt catalysts showed the improved FTS rate （gHc/（gcat.min））, CO conversion （%）, and water gas shift rate （WGS）（gcoz/（gcat.h）） of 0.012, 52, and 30E-3, respectively, as compared to those of 0.007, 25, and 18E-3, respectively, on the γ-alumina-supported cobalt catalysts with the same Co loading.

关键词： carbon nanotubes nanohybrid cobalt catalyst alumina FT synthesis sol-gel

Study on Intercalative nanohybrid of Cordycepin in Layered Double Hydroxide

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Chinese Chemical Letters 2003年第10期14卷 1097-1100页

作者： JianYaLING JingYANG OinZhengYANG JunFengPENG HanXingZHANG ChangKaiZHANG StateKeyLaboratoryofMicrobialTechnology ShandongUniversityJinan250100 DepartmentofOptics ShandongUniversityJinan250100 KeyLaboratoryforColloid&InterfaceChemistryofEducationMinistry ShandongUniversityJinan250100

A novel negatively charged biomolecule-cordycepin has been intercalated within the gallery spaces of [Mg-Al-NO3]. Results of TEM, PXRD and FT-IR spectroscopy confirmed that cordycepin could be intercalated into [Mg-Al-NO3] interlayers as the charge-compensating species. Initial studies suggest that the new bioinorganic nanocomposite may be used as a novel inorganic reservoir or carrier of pharmaceutically active compounds.

关键词： Layered double hydroxide nanohybrid cordycepin intercalate.

Preparation and Biosafety Evaluation of the Peptide Dendron Functionalized Mesoporous Silica nanohybrid

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Chinese Journal of Chemistry 2014年第1期32卷 27-36页

作者： Dayi Pan Chunhua Guo Kui Luo[*] Zhongwei Gu[*] National Engineering Research Center for Biomaterials Sichuan University Chengdu Sichuan 610064 China Email: Kui Luo (luokui@***) Zhongwei Gu (zwgu@***)[*]National Engineering Research Center for Biomaterials Sichuan University Chengdu Sichuan 610064 China Tel.: 0086-028-85410336 Fax: 0086-028-85410653

Mesoporous silica nanoparticles (MSNs) have been extensively studied and proposed as promising candidates for numerous biomedical applications.In this study,we report the design,preparation,characterization and biosafety evaluation of peptide dendron functionalized mesoporous silica nanohybrid.This nanohybrid was prepared by surface modification of MSNs via click reaction of azido-MSNs with alkynyl peptide dendrons,and characterized by TEM,SEM,TGA,dynamic light scattering (DLS).In vitro cytotoxicity of the nanohybrid was evaluated against different cell lines by CCK-8 assay.The in vivo toxicity evaluation was measured by body weight shift,blood routine test and histological analysis,suggesting that the peptide functionalized nanohybrid possessed good biocompatibility due to the non-observed significant side effects to normal organs of healthy mice.Overall,considering our results we believe that the peptide dendron functionalized mesoporous silica nanohybrid is very promising in further biomedical applications.

关键词： mesoporous silica nanoparticles peptide dendrimer nanohybrid toxicity biosafety

Fabrication of novel bifunctional nanohybrid based on layered rare-earth hydroxide with magnetic and fluorescent properties

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Frontiers of Materials Science 2020年第4期14卷 488-496页

作者： Qingyang GU jinyan LI Liangshuo JI Ruijun JU Haibo JIN Rongyue ZHANG Department of Chemical Engineering Beiing Institute of Petrochemical TechnologyBejing 102617China Beiing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology Beiing 102617China

We demonstrate the fabrication of a novel magnetic nanohybrid involving the drug molecule 5 aminolevulinic acid(5-ALA)intercalated Gd-Eu layered rare-earth hydroxide(LRH)coated on magnesium ferrite particles(MgFe2O4).The structure,thermostability,morphology,luminescence properties,cytotoxic effect and magnetism are investigated.The 5-ALA intercalated composite may correspond to a monolayered vertical arrangement,and the thermal stability of organics is enhanced after intercalation.The LRH precursor shows red emission of Eu^3+and the maximum emission peak of the composite is at 451 nm,corresponding to the blue emission.The detection of drug molecules can be realized through the change of luminescence.The magnetic nanohybrid shows strong magnetic sensitivity,which provides an easy and efficient way to separate 5-ALA-MgFe2O4@LGd0.95H:Eu0.05 particles from a sol or a suspension system and to carry drugs to targeted locations under an external magnetic field.The cytotoxic effect of MgFe2O4@LRH is observed with a sulforhodamine B(SRB)colorimetric assay,which has low cytotoxic effects on selected cells.The fabrication of novel bifunctional drug carriers based on LRH with magnetic and fluorescent properties has potential applications in drug detection and drug delivery.

关键词： layered rare-earth hydroxide magnesium ferrite nanohybrid magnetism luminescence

Covalent edge-functionalization of graphene oxide with porphyrins for highly efficient photoinduced electron/energy transfer and enhanced nonlinear optical performance

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Nano Research 2023年第1期16卷 25-32页

作者： Lulu Fu Mark G.Humphrey Chi Zhang China-Australia Joint Research Center for Functional Molecular Materials School of Chemical Science and EngineeringTongji UniversityShanghai 200092China School of Chemical and Material Engineering Jiangnan UniversityWuxi 214122China Research School of Chemistry Australian National UniversityCanberraACT 2601Australia

Covalent modification of graphene oxide(GO)with functional chromophores plays an important role in constructing various kinds of advanced optoelectronic materials for applications in molecular diagnosis,light-harvesting,photodynamic therapy,and optical limiting.Herein,a new approach to functionalizing GO with meso-substituted formylporphyrins at GO’s edge sites via imidazole condensation is developed,which affords a novel GO-imi-Por nanohybrid covalently-linked by imidazole rings between two components.The structure of the GO-imi-Por nanohybrid was thoroughly characterized by scanning electron microscopy(SEM),attenuated total reflectance-Fourier transform infrared(ATR-FTIR),Raman,and X-ray photoelectron spectroscopy(XPS).The red-shifted steady-state absorption,95%quenched fluorescence,and largely enhanced nonlinear optical(NLO)properties through Z-scan studies at lower input energies demonstrate that this GO-imi-Por nanohybrid exhibits a more effective photoinduced energy/electron transfer between the intrahybrid two components and can be flexibly applied as an optical limiter candidate.This covalent edge-functionalization approach provides a new paradigm for constructing various edge-expanding GO nanohybrids with an efficient energy/electron transfer process and improved nonlinear optical effects,which would draw inspiration for engineering more adaptable optoelectronic devices.

关键词： covalent edge-functionalization nonlinear optics graphene oxide porphyrin nanohybrid

3D hierarchical oxygen-deficient AlCoNi-(oxy)hydroxides/N-doped carbon hybrids enable efficient battery-type asymmetric supercapacitor

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Journal of Energy Chemistry 2022年第9期31卷 416-423,I0012页

作者： Renjie Zhang Wei Zhang Qun Yang Jidong Dong Lina Ma Zaixing Jiang Yudong Huang College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071ShandongChina Material Science and Engineering College Northeast Forestry University Harbin 150040HeilongjiangChina MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Chongqing Research Institute of HIT Chongqing 401135China

Polynary transition-metal layered hydroxides are promising energy materials owing to their unique architecture,impressive theoretical capacities,and adjustable compositions.Regulating the dimensional morphology and active sites/redox states are the keys to electrochemical performance enhancement.Distinguish from the reported mono-metal or binary-metal configurations,a new ternary-metal AlCoNi-LTH is coanchored onto a highly graphitized porous N-doped carbon matrix to develop superior 3D hierarchical microporous functional energy hybrids AlCoNi-LTHs/NAC.The constructed hybrids possess superior structural durability,good electrical conductivity,and rich active sites due to the strong interfacial conjunction and favorable synergistic effect between the doped porous carbon and AlCoNi nanosheets.Consequently,the AlCoNi-LTHs/NAC hybrids demonstrate high conductivity,reasonable specific surface area,and superior specific capacitance,and the assembled hybrid battery-type supercapacitor reveals an ideal energy density of 72.6 Wh kg^(-1)at a power density of 625 W kg^(-1),which is superior to the reported devices.This strategy opens a platform to rationally design polynary transition-metal layered hydroxides and their hybrids for efficient supercapacitors.

关键词： N-doped carbon Layered tri-metal hydroxides nanohybrid Hybrid battery-type asymmetric supercapacitor Coupling synergy

Facile Synthesis of NiFe_2O_4/Reduced Graphene Oxide Hybrid with Enhanced Electrochemical Lithium Storage Performance

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Journal of Materials Science & Technology 2014年第11期30卷 1078-1083页

作者： Peiyi Zhu Shuangyu Liu Jian Xie Shichao Zhang Gaoshao Cao Xinbing Zhao Industrial Technology Research Institute Zhejiang University State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang University Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics

In this work, a facile, one-pot route has been applied to synthesize nanohybrids based on mixed oxide NiFe2O4 and reduced graphene oxide （rGO）. The hybrid is constructed by nanosized NiFe2O4 crystals confined by few- layered rGO sheets. The formation mechanism and microstructure of the hybrids have been clarified by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy. Electrochemical tests show that the performance of NiFe2O4 can be considerably improved by rGO incorporation. The performance improvement can be attributed to the two-dimensional conductive channels and the unique hybrid structure rGO constructed. The easy synthesis and good electrochemical performance of NiFe2O4/rGO hybrid make it a promising anode material for Li-ion batteries.

关键词： Reduced graphene oxide Nickel ferrite oxide nanohybrid Electrochemical performance One-pot synthesis